Ven. Bodhi's translation of the AN can be had new for ~$60, and his translations are far clearer. Or just wait until Ven. Sujato has finished translating the AN and releases it for free on suttacentral.org, probably a year or so out from release.

Towards the end of that thread, after a gap of a few years, you'll see that the new BPS version was released as a book for purchase and a downloadable PDF. It would, of course, be nice if that happened with more books.

The Visuddhimagga is distributed for free—but the printed version still costs something, due to production costs (giving the printed books for free would surely make the publishers go bankrupt in a very short amount of time).

While Bhikkhu Bodhi is the author/translator, I am 100% certain he doesn't get a salary (since he can't even touch money). It is possibly Wisdom Publications which accepts and redistributes the funds, or another organization.

Regarding charging money for the Suttas, printing and distribution does cost money. Wisdom Publications also do need to cover their expenses and pay their employees (who aren't monastics and have to pay for food, housing and other basic necessities).